scholarly journals Distributed Co-simulation of Maritime Systems and Operations

2018 ◽  
Vol 141 (1) ◽  
Author(s):  
Severin Sadjina ◽  
Lars Tandle Kyllingstad ◽  
Martin Rindarøy ◽  
Stian Skjong ◽  
Vilmar Æsøy ◽  
...  
Keyword(s):  
Best Practices ◽  
Performance Studies ◽  
System Simulation ◽  
Virtual Prototyping ◽  
Simulation Software ◽  
Model Coupling ◽  
Full System ◽  
Reusable Component ◽  
And Performance ◽  
High Level

Here, we present the concept of an open virtual prototyping framework (VPF) for maritime systems and operations that enables its users to develop reusable component or subsystem models, and combine them in full-system simulations for prototyping, verification, training, and performance studies. This framework consists of a set of guidelines for model coupling, high-level and low-level coupling interfaces to guarantee interoperability, a full-system simulation software, and example models and demonstrators. We discuss the requirements for such a framework, address the challenges and the possibilities in fulfilling them, and aim to give a list of best practices for modular and efficient virtual prototyping and full-system simulation. The context of our work is within maritime systems and operations, but the issues and solutions we present here are general enough to be of interest to a much broader audience, both industrial and scientific.

Performance Studies on Campus-Wide Focus on FTP, Video and VoIP Ethernet Network

2012 ◽  
Vol 4 (1) ◽  
pp. 49-59 ◽  
Author(s):  
Nuru I. Sarkar ◽  
Kashif Nisar ◽  
Layangi Babbage
Keyword(s):  
Network Model ◽  
Performance Studies ◽  
Asynchronous Transfer Mode ◽  
Simulation Software ◽  
Segment Length ◽  
Campus Network ◽  
Atm Network ◽  
Type Data ◽  
And Performance ◽  
The Impact

The Advanced Network Technologies is research that investigates technology(s) behind today’s modern networks and network infrastructures. One part of this technology being Asynchronous Transfer Mode (ATM). A technology commonly in place in networks all around the world today. This paper focuses on ATM. Dubbed “Modelling and Performance Studies of ATM Networks”; this research seeks to look at and into the “impact of application segment length on the performance of an ATM network” and the “impact of traffic type data on the performance of an ATM network”. To be able to examine an ATM network, the authors need to be able to simulate a network. Thus, for this research, they have used the OPNET Modeler 14.0 Simulation software to create a network model that represents a ATM network. By actually simulating an ATM network at AUT University New Zealand, the authors can therefore change certain variables, and observe the effects the changes have on performance. As stated, one of the impacts that will be explored is the effect that application segment length has on an ATM network. Thus, one variable that will be changed in the authors’ simulation is the segment length. This is the length of each packet segment that is sent through the network for a particular traffic type. The second impact to be inspected is the impact of different traffic types on an ATM network. This network model is based on a campus network. An Application Configuration is setup with default parameters which specify 8 common applications used. Among them the ones that the authors will focus on are VOIP, Video and FTP. A Profile Configuration is setup that will define the 3 applications stated above. A fixed node model of 100BaseT will specify the profile configuration for each scenario and the number of work stations of each scenario.

scholarly journals A Contribution for Virtual Prototyping of Mechatronic Systems Based on Real-Time Distributed High Level Architecture

2011 ◽  
Vol 12 (1) ◽  
Author(s):  
H. J. Hadj-Amor ◽  
T. Soriano
Keyword(s):  
Real Time ◽  
Geometric Model ◽  
Virtual Prototyping ◽  
Rapid Evolution ◽  
Behavior Model ◽  
Hybrid Automata ◽  
Mechatronic Systems ◽  
Work Related ◽  
And Performance ◽  
High Level

Mechatronics is the integration of different sciences and techniques of mechanical engineering, automatic control, electronics, and informatics. The rapid evolution of the market competitors requires the reduction of development time of a product while increasing the quality and performance. It is, therefore, necessary to increase the efficiency of the design process. To meet this need, simulation and, especially, virtual prototyping have become a key technology. It is difficult to find simulation tools are able to analyze multidependent systems of different areas. However, an environment that allows a simulation integrating multidisciplinary mechatronic systems is necessary. This paper describes a method of design and simulation of mechatronic systems. First, we identify the behavior model and its associated 3D geometric model. The behavior model is seen as a dynamic hybrid system of two coupled hybrid automata (operative part and control part). Then, we present OpenMASK and OpenModelica simulators, the IEEE1516 standard HLA and work related to this distributed architecture for simulation. In a top-down approach, we present our method and experiments to integrate HLA functionalities in these simulators and to distribute the modeling elements of mechatronic systems. Also, we propose extensions to integrate real-time for interactive simulations. Finally, we apply our approach on a representative example of a mechatronic system.

scholarly journals Pathêt: di Atas Kertas dan di Atas Panggung Wayang Kulit dalam Perspektif Teori Praktik

2013 ◽  
Vol 10 (2) ◽  
Author(s):  
Wisma Nugraha Christianto ◽  
Timbul Haryono ◽  
G. R. Lono L. Simatupang ◽  
Soetarno
Keyword(s):  
Performance Studies ◽  
Social Dynamics ◽  
Social Reality ◽  
Problem Solution ◽  
Puppet Theater ◽  
And Performance ◽  
High Level ◽  
Wayang Kulit ◽  
Symbolic Formation ◽  
Practical Level

Pathêt: on the Paper and on the Stage of Shadow Puppet Theater in Practice Theory Perspectif. Researchesabout karawitan focusing on pathêt has given conceptual result which repairs and clarifi es the result of previousresearches, with different paradigms. Some are even repetitive. On the other hand, in the practical level and socialdevelopment, some changes and dynamic art performing paradigm have changed. If the researches and the researchparadigms on this matter cannot accommodate the changes, the result will be static. There have been some pathêtresearches that inspired a critical development of karawitan and performance studies. The result of the researchesimplied a temporal context, demanding revisiting on the temporary context and its relation to non-theoretical matter,partial, practicality, and social reality. A scientifi c construction based on human activity as a practice is neededto construct scientifi c atmosphere to balance social dynamics, performance, and the harmony of gending karawitanrelated to the utilization of pathêt as a part of coherent structure. Social reality of wayang kulit stage is close to theaesthetic and art feel towards karawitan music. Social structure and performance structure in the present time do notalways posses linier relation to the symbolic structure and past aesthetic. Symbolic and aesthetic constructs have theability of symbolic formation and high level of musical appreciation. Therefore, Pierre Bourdieu’s practical critiqueserves as an alternative encouragement reacting to critical pretension towards problem solution and reception ofpathêt in the conceptual and practical level

scholarly journals An Auto-Programming Approach to Vulkan

2021 ◽  
Author(s):  
Vladimir Alexandrovich Frolov ◽  
Vadim Sanzharov ◽  
Vladimir Alexandrovich Galaktionov ◽  
Alexandr Scherbakov
Keyword(s):  
Performance Studies ◽  
General Purpose ◽  
Software Implementation ◽  
Programming Approach ◽  
Fine Grained ◽  
Speed Up ◽  
Cross Platform ◽  
Increase Productivity ◽  
And Performance ◽  
High Level

We propose a novel high-level approach for software development on GPU using Vulkan API. Our goal is to speed-up development and performance studies for complex algorithms on GPU, which is quite difficult and laborious for Vulkan due to large number of HW features low level details. The proposed approach uses auto programming to translate ordinary C++ to optimized Vulkan implementation with automatic shaders generation, resource binding and fine-grained barriers placement. Our model is not general-purpose programming, but is extendible and customer-focused. For a single C++ input our tool can generate multiple different implementations of algorithm in Vulkan for different cases or types of hardware. For example, we automatically detect reduction in C++ source code and then generate several variants of parallel reduction on GPU: with optimization for different warp size, with or without atomics, using or not subgroup operations. Another example is GPU ray tracing applications for which we can generate different variants: pure software implementation in compute shader, using hardware accelerated ray queries, using full RTX pipeline. The goal of our work is to increase productivity of developers who are forced to use Vulkan due to various required hardware features in their software but still do care about cross-platform ability of the developed software and want to debug their algorithm logic on the CPU. Therefore, we assume that the user will take generated code and integrate it with hand-written Vulkan code.

Modelling and Performance Studies of ATM Networks Over Email & FTP

2012 ◽  
Vol 4 (2) ◽  
pp. 16-25 ◽  
Author(s):  
Nurul I. Sarkar ◽  
Kashif Nisar
Keyword(s):  
Performance Studies ◽  
Asynchronous Transfer Mode ◽  
Real Life ◽  
Simulation Software ◽  
Segment Length ◽  
Atm Networks ◽  
Atm Network ◽  
Type Data ◽  
And Performance ◽  
The Impact

The Advanced Network Technologies is a research that investigates the technology(s) behind today’s modern networks and network infrastructures – one of these technologies being Asynchronous Transfer Mode (ATM); a technology commonly in place in networks all around the world today. Therefore, this paper focuses its attention on ATM. Dubbed “Modelling and Performance Studies of ATM Networks,” this research looks into the “impact of application segment length on the performance of an ATM network” and the “impact of traffic type data on the performance of an ATM network.” For this research, the authors have used the OPNET Modeler 14.0 Simulation software to create a network model that represents a real-life ATM network. By simulating an ATM network at AUT University New Zealand, the authors can change certain variables, and observe the effects the changes have on performance. As such, one of the impacts that will be explored is the effect that application segment length has on an ATM network. The second impact to be inspected is the impact of different traffic types on an ATM network. For example, Email traffic should theoretically affect an ATM network differently to the way that Voice traffic does. This way of thinking is what will be looked into further.

scholarly journals Dynamic Mapping of Along-Track Ocean Altimetry: Method and Performance from Observing System Simulation Experiments

2016 ◽  
Vol 33 (8) ◽  
pp. 1691-1699 ◽  
Author(s):  
Clement Ubelmann ◽  
Bruce Cornuelle ◽  
Lee-Lueng Fu
Keyword(s):  
System Simulation ◽  
Three Dimensional ◽  
Altimetry Data ◽  
Simulation Experiments ◽  
Inverse Approach ◽  
Covariance Functions ◽  
Ocean Altimetry ◽  
And Performance ◽  
High Level ◽  
Along Track

AbstractSimulated along-track ocean altimetry data were used to implement the use of a nonlinear dynamic propagator to perform three-dimensional (time and 2D space) interpolation of mesoscale sea surface height (SSH). The method is an inverse approach to processing altimetry data unevenly sampled in time and space into high-level gridded altimetry maps. The inverse approach, similar to the standard objective mapping, contains some correction terms to the innovation vectors to account for nonlinear dynamics. Another key improvement is to solve for the covariance functions through a Green’s function approach. From the Observing System Simulation Experiments carried out to simulate a three-satellite constellation over the Gulf Stream region, the new method can significantly reduce mapping errors and improve the resolving capabilities compared to the standard linear objective analysis such as that used by the AVISO gridding.

https://imsciences.edu.pk/files/journals/vol12_2/New%201%20MA.864.pdf

2020 ◽  
Vol 12 (2) ◽  
pp. 19-50 ◽  
Author(s):  
Muhammad Siddique ◽  
Shandana Shoaib ◽  
Zahoor Jan
Keyword(s):  
Organizational Performance ◽  
Structural Equation ◽  
High Performance ◽  
Service Sector ◽  
Performance Outcomes ◽  
Theory And Practice ◽  
Relational Coordination ◽  
Multiple Sources ◽  
And Performance ◽  
High Level

A key aspect of work processes in service sector firms is the interconnection between tasks and performance. Relational coordination can play an important role in addressing the issues of coordinating organizational activities due to high level of interdependence complexity in service sector firms. Research has primarily supported the aspect that well devised high performance work systems (HPWS) can intensify organizational performance. There is a growing debate, however, with regard to understanding the “mechanism” linking HPWS and performance outcomes. Using relational coordination theory, this study examines a model that examine the effects of subsets of HPWS, such as motivation, skills and opportunity enhancing HR practices on relational coordination among employees working in reciprocal interdependent job settings. Data were gathered from multiple sources including managers and employees at individual, functional and unit levels to know their understanding in relation to HPWS and relational coordination (RC) in 218 bank branches in Pakistan. Data analysis via structural equation modelling, results suggest that HPWS predicted RC among officers at the unit level. The findings of the study have contributions to both, theory and practice.

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